Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a largura de banda agregada máxima com um HyperTransport de 2?
 ###Tabelas: CREATE TABLE qualifying_races (qualifying_races_id AUTO_INCREMENT PRIMARY KEY, Place VARCHAR, Country VARCHAR, Qualifying Grand Prix VARCHAR, Class VARCHAR, Dates VARCHAR) CREATE TABLE frequency_specifications (frequency_specifications_id AUTO_INCREMENT PRIMARY KEY, HyperTransport version INT, Year INT, Max. HT frequency VARCHAR, Max. link width VARCHAR, Max. aggregate bandwidth (bi-directional) VARCHAR, Max. bandwidth at 16-bit unidirectional VARCHAR, Max. bandwidth at 32-bit unidirectional* VARCHAR) CREATE TABLE light-heavyweight___85_kg (light-heavyweight___85_kg_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Bodyweight INT, Snatch INT, Clean & Jerk INT, Total (kg) INT) CREATE TABLE a (a_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Pos. VARCHAR, From INT, School/Country VARCHAR, Rebs INT, Asts INT) CREATE TABLE 75_million_to_79_million_records (75_million_to_79_million_records_id AUTO_INCREMENT PRIMARY KEY, Artist VARCHAR, Country of origin VARCHAR, Period active VARCHAR, Release-year of first charted record INT, Genre VARCHAR, Claimed sales VARCHAR)  
SELECT Max. aggregate bandwidth (bi-directional) FROM frequency_specifications WHERE HyperTransport version = 2